JP6970966B2 - snowblower - Google Patents

Description

The present invention relates to a snowplow in which a snow removal auger and a snow removal section for throwing the scraped snow by a blower are provided in the front portion of the machine body, and a snow removal plate can be arranged further in front of the snow removal section. ..

Conventionally, a snowplow provided with a snow auger and a snowplow portion for throwing snow by a blower is known. Further, a snowplow capable of further arranging a snowplow in front of the snowplow section is also known. For example, the "snowplow" of Japanese Patent Application Laid-Open No. 2015-187340 is known. With this snowplow, it is possible to efficiently perform snow removal work by throwing snow with the blower of the snow removal section when working in a place where a sufficient snow throwing place can be secured, and when it is not possible to secure a sufficient snow throwing place, etc. When the amount of snow is small, switching to the work of pushing out snow with a snow removal plate has the advantage that snow removal work can be performed efficiently.

Japanese Unexamined Patent Publication No. 2015-187340

As mentioned above, efficient work is possible by switching between a snow removal method that throws snow with a blower and a snow removal method that pushes out snow with a snow removal board, but depending on the product variation, it is orthogonal to the traveling direction of the auger snow remover. When the working width in the direction of the snowplow is widened, the width of the snowplow plate is also widened, and the weight of the snowplow plate is inevitably increased. In the snowplow of Patent Document 1, lifting the snowplow with increased weight when switching between the working state with the snowplow and the non-working state has a problem of imposing a heavy burden on the operator. Further, when the posture of the snow removal plate is maintained in a non-working state, the stopper pin of the rotating arm provided on the snow removal plate is fitted into the engagement hole of the stopper bracket and the retaining pin is inserted. While holding the heavy snow-removing plate with one hand, the stopper pin must be inserted with the other hand. If the operator mistakenly holds the snow-removing plate, the snow-removing plate will rotate and fall. It is dangerous.
Therefore, the present invention reduces the operational burden when switching between the working state and the non-working state of the snowplow, and simplifies the posture holding operation and the posture releasing operation in the non-working state of the snowplow. It is an object of the present invention to provide a snowplow that can be easily switched by a person and can perform efficient snowplow work.

In order to solve the above problem, the snowplow according to claim 1 is provided with an auger housing that opens toward the front, and the snow collected in the center by the rotating auger in the auger housing is rotationally driven behind the auger housing. In a snowplow having a snowplow portion for throwing snow with a blower at the front portion of the machine body, the snowplow has a snowplow plate that can be arranged in front of the snowplow portion, and the snowplow plate is the snowplow portion. It is possible to switch between the snowplow board working state located in the front and the snowplow non-working state located above the auger housing, and the switching is extended to the left and right from the snowplow board. The structure is such that the snow removal plate is rotated and switched by a rotation arm rotatably attached up and down via a support arm provided on the outer side of the left and right side plates of the auger housing, and the snow removal plate is attached to the rotation arm. The rotating arm includes an elastic body for a rotating arm so as to be urged in the direction of rotation toward the upper side, an upper bent portion with the upper side bent, and a rear bent portion with the rear side bent. The support arm abuts on the upper bent portion to restrict the downward rotation of the rotating arm in the snow removal plate working state, and the support arm locks one end to the rear bent portion. The snowplow is provided with a locking portion for locking the other end of the rotating arm elastic body.

Further, in order to solve the above problems, snowplow according to claim 2, the orientation of the snow board snow board non-working state, and fixing means which can fix the posture, the fixing means, The snowplow plate is provided with an elastic body for fixing means for urging the snowplow plate in a non-working state, and the snowplow plate is released only when the fixing means is released. The snowplow according to claim 1, wherein the snowplow is released from the non-working state.

Further, in order to solve the above-mentioned problem, the snowplow according to claim 3 includes the fixing means including an inclined portion provided at the end edge of the tip portion outside in the radial direction of rotation, and the snowplow plate is provided with an inclined portion. The posture in the snowplow non-working state is such that the snowplow is simply rotated from the snowplow working state to the snowplow non-working state, and the inclined portion guides the rotating arm and the fixing means. The snowplow according to claim 2, wherein the snowplow can be fixed by the snowplow.

Further, in order to solve the above-mentioned problem, in the snowplow according to claim 4, the snowplow has a handle portion for operating the snowplow to rotate, and the fixing means has the above-mentioned fixing means. A lever for operating the fixing means is provided, and the handle portion of the snowplow plate in a non-working state and the lever are arranged close to each other so that they can be operated with one hand, and the handle portion is arranged. The claim is characterized in that the snow removal plate can be rotated by continuously gripping the handle portion even after gripping the lever together with the lever and releasing the hand from the lever. The snowplow according to 3.

According to the present invention, the operation load at the time of switching between the working state and the non-working state of the snow removal plate is reduced. Further, it is possible to provide a snowplow that can easily switch the snowplow by an operator by simplifying the posture holding operation and the posture release operation in the non-working state of the snowplow, and can efficiently perform the snowplow work.

It is a left side view of the snowplow which shows the 1st Embodiment of this invention in a non-working state. It is a left side view at the time of the snow removal board working state of the snowplow which shows the 1st Embodiment example of this invention. It is a front view of the snowplow which shows the 1st Embodiment example of this invention, and is seen from the front in the traveling direction in the non-working state of the snowplow. It is a side view which enlarged by the cross section of the snow removal board at the time of the snow removal board working state of the snowplow which shows the 1st Embodiment example of this invention. Snowplow plate of the snowplow showing an example of the first embodiment of the present invention The snowplow plate in the non-working state is cross-sectionald by AA shown in FIG. be. It is a left side view which expanded the part of the main part of the snowplow in the non-working state of the snowplow which shows the 1st Embodiment example of this invention with a partial cross section. It is the left side view which enlarged the main part in the snow removal board working state of the snow blower which shows the 2nd Embodiment example of this invention. It is the left side view which enlarged the main part in the snow removal board working state of the snow blower which shows the 3rd Embodiment example of this invention.

The first embodiment of the embodiment of the present invention will be described with reference to FIGS. 1 to 6.
The snowplow 1 is provided with traveling crawler belts 4 on the left and right sides of the machine for traveling, and drives the traveling crawler belts 1 to travel forward and backward. A snow removal unit 5 is provided in the front part of the machine body, an operation unit 3 for operating the machine body is provided in the rear part of the machine body, and an engine part 2 containing a traveling part and an engine which is a power source of the snow removal part 5 is provided in the center part of the machine body.

The operation unit 3 is provided with handles 30 to be gripped and operated by the operator on the left and right, and operation levers and switches for operating each part of the machine body are provided at the center thereof, and the operator can use these. Operate to remove snow.

The snow removing portion 5 provided in the front portion of the machine body collects snow in the central portion by an auger 51 provided on a horizontal rotation axis orthogonal to the traveling direction, and a blower provided in the rear of the central portion collects snow from a shooter 52 facing upward. Throw snow. The direction of snow throwing can be changed by horizontally rotating the shooter 52. Further, the snow throwing angle can be adjusted by changing the angle of the deflector 520 at the upper end of the shooter 52. The auger 51 is covered with an auger housing 50 having an open front portion, and is provided for safety such as preventing the auger 51 from being caught in the auger 51 while inducing the auger 51 to scrape snow.

A snow removal plate 6 that pushes out snow by advancing the snow remover 1 can be arranged in front of the snow removal unit 5. The snow removal plate 6 can be switched between the snow removal plate working state shown in FIG. 2 located in front of the snow removing portion 5 and the snow removal plate non-working state shown in FIG. 1 located above the auger housing 50. It is possible. The switching is switched by a rotation arm 60 extending from the snow removal plate 6 to the left and right, and vertically rotatably attached to the outer side of the auger housing side plate 500 at the left and right ends of the auger housing 50. It has a structure. In the non-working state of the snow removal plate in which the snow removal plate 6 is located above the auger housing 50, the snow removal unit 5 can be driven to perform snow removal work of throwing snow.

Snow removal work by snow throwing is efficient in places where a sufficient snow throwing place can be secured. However, if a sufficient snow-throwing place or the like cannot be secured or the amount of snow is small, the snow-removing work can be efficiently performed by switching to the snow-removing work by pushing out the snow with the snow-removing plate 6. The snow removal work by the snow removal plate 6 is performed after the drive of the snow removal unit 5 is stopped and the snow removal plate 6 is rotated so as to be located in front of the snow removal unit 5.

The snow removal plate 6 includes a blade 61 for pushing snow, a scraper 62 provided at the lower end of the blade 61, and blade side plates 63 provided at the side ends on both sides of the blade 61. A handle portion 64 held by an operator to operate the vertical rotation of the snow removal plate 6, a rotation arm 60 connecting the snow removal plate 6 to the snow removal plate 5 so as to be vertically rotatable, and the above. A support arm 65 for holding the rotating arm 60 in the auger housing 50, and an elastic body 66 for the rotating arm for urging the snow removal plate 6 on the upper side in the rotating direction are provided. ..

The blade 61 has a substantially arcuate arcuate shape with an opening facing forward and a lateral cross section bulging backward in order to push the snow in the snow removal plate working state. The width of the blade 61 is equal to or wider than the width of the outer end of the auger housing 50.
A scraper 62 is attached to the lower end of the blade 61 over substantially the entire width of the blade 61. The scraper 62 is a substantially rectangular plate member having a width substantially the same as that of the blade 61 in a direction orthogonal to the traveling direction.
When the snow removal plate 6 is in the snow removal plate working state, the scraper 62 has an effect of guiding snow to the blade 61 and scraping it. The scraper 62 is inclined at an acute angle from the front end to the rear, and the blade 61 is pressed against the snow surface to bite into it, and by advancing, the snow is guided along the concave surface on the front surface of the blade 61 and rises. Then, from the upper part that curves forward, drop it forward and collect it.
The blade side plate 63 is provided at the side end portions on both sides of the blade 61, and is configured to prevent snow from leaking from the side of the blade 61.

The handle portion 64 is a rod-shaped member bent in a U shape, the bent portion is directed upward and backward, and the end portion is the upper portion of the blade 61 in the snow removal plate working state, and FIG. 3 on the right side in the traveling direction. It is fixed on the left side shown in. Further, in the lateral cross-sectional view shown in FIG. 4, the handle portion 64 is bent upward from a substantially central portion in a dogleg shape. The operator can grip the handle portion 64 and rotate the snow removal plate 6 up and down, and the snow removal plate 6 can be switched between a snow removal plate working state and a snow removal plate non-working state.

The rotating arm 60 extends from the rear surface portion of the blade 61 to the outer portion of the auger housing side plate 500 on the left and right sides of the auger housing 50, and rotates to the outer portion of the auger housing side plate 500 via the support arm 65. It can be mounted freely. FIG. 4 is a view showing a cross section of a snow removal plate 6 in a snow removal plate working state in which the blade 61 is located in front of the snow removal portion 5. The rotating arm 60 in this example is made of sheet metal and has a substantially unequal-sided triangular shape having corners above the side view, and the rear surface portion of the blade 61 is fixed to the front corner portion.
A part of the upper side and the rear side extending upward from the front of the rotating arm 60 is bent inward in an L shape to give rigidity. The upper side bent in an L shape inward of the rotating arm 60 forms an upper bent portion 602, and the rear side forms a rear bent portion 603.

The lower side portion of the rotating arm 60 is in a state of being cut with the end surface of the plate facing downward. When the snow removal plate 6 is in a non-working state, the lower side portion of the rotation arm 60 is rotated upward so as to face forward in the traveling direction, and the front end of the auger housing side plate 500. Located in front of the edge.

A round bar-shaped pin 604 is fixed to the substantially central portion of the rotating arm 60 in the snow removal plate working state in the vicinity of the lower side of the upper bent portion 602 toward the inside of the rotating arm 60 and perpendicular to the surface. Will be done. The pin 604 is used to hold and fix the posture of the snow removal plate 6 when the snow removal plate is not working. The method of using the pin 604 will be described later.

The rotation fulcrum of the rotation arm 60 is provided inward in the vicinity of the upper corner portion of the side view substantially unequal side triangle of the rotation arm 60, and is a horizontal rotation axis orthogonal to the traveling direction. The rotation arm is rotatably held up and down by the rotation fulcrum 601. The rotating arm fulcrum 601 is a pin-shaped member having a through hole at the center of the shaft and a counterbore at the outer end. The rotation arm rotation fulcrum 601 is rotatably supported by a support arm 65 arranged on the outer side of the auger housing side plate 500 on the left and right sides of the auger housing 50.

The support arm 65 includes a mounting seat 651, which is a mounting portion for the auger housing side plate 500, a boss 652 for rotatably supporting the rotating arm rotation fulcrum 601 and the rotation of the rotating arm 60. It includes a lower stopper 655 that regulates movement, and a locking portion 656 for locking the elastic body 66 for a rotating arm, which will be described later.

The mounting seat 651 is a substantially circular plate having a plurality of bolt mounting holes for co-fastening with the bearing holding portion 511 located inside the auger housing side plate 500 and the auger housing side plate 500. Further, a hole for releasing a bolt for preventing the rotation shaft of the auger 51 from coming off is formed in the substantially central portion of the mounting seat 651. A boss 652 for holding the rotation arm rotation fulcrum 601 is provided on the upper side behind the hole provided in the substantially central portion.

The boss 652 is a cylindrical member provided on the outer surface of the mounting seat 651 and having an axis perpendicular to the surface of the mounting seat 651 and fixed to the boss 652. The boss 652 is provided at a position offset upward and rearward from the rotation axis center 512 of the auger 51. By inserting the rotation arm rotation fulcrum 601 into the inner diameter portion of the boss 652, the rotation arm 60 is rotatably connected to the support arm 65.
Further, the bolt 653 is inserted concentrically with the shaft of the boss 652 from the auger housing side plate 500 side of the mounting seat 651 toward the outside. The head of the bolt 603 is fixed so as to sink into a counterbore hole provided on the inner surface of the mounting seat 651, and the end surface of the head of the bolt 653 is substantially the same as the inner surface of the mounting seat 651. It is provided.

The bolt 653 passes through a through hole provided in the shaft portion of the rotation arm rotation fulcrum 601 and a nut 654 is screwed in from the outside of the rotation arm rotation fulcrum 601. In this embodiment, the nut 654 is a preveling torque type nut and does not loosen even if it is not completely tightened, so that it is not completely tightened. The nut 654, which is not completely tightened, does not hinder the rotation of the rotating arm 60, and at the same time, restricts the horizontal movement of the rotating arm rotation fulcrum 601. A lower stopper 655 is located above the mounting seat 651.

The lower stopper 655 is a plate-shaped member provided above the mounting seat 652 in the outer direction and perpendicular to the surface of the mounting seat 652. In this embodiment, the upper surface of the lower stopper 655 is inclined so as to have an angle of 15 to 35 degrees so that the rear is raised with respect to the horizontal plane.
The lower stopper 655 is in contact with the upper bent portion 602 of the rotating arm 60 to restrict downward rotation when the blade 61 is in a snow removal plate working state located in front of the snow removing portion 5. effective. When the snow removal plate is in the working state, the snow removal plate 6 having the rotation arm 60 whose downward rotation is restricted by the lower stopper 655 can keep the amount of biting downward.
A locking portion 656 is provided on the lower surface of the lower stopper 655.

The locking portion 656 is a plate-shaped member for locking the end portion of the elastic body 66 for a rotating arm, which will be described later, and is provided outside the mounting seat 652 and perpendicular to the lower surface of the lower stopper 655. .. The boss 652 is provided with an elastic body 66 for a rotating arm, which is arranged so as to hook an end portion to the locking portion 656.

The elastic body 66 for a rotating arm is provided on each of the rotating arms 60 arranged on the left and right outer sides of the auger housing 50 in order to assist the rotation of the rotating arm 60 upward. In this embodiment, the elastic body 66 for the rotating arm is a torsion coil spring.
The circular coil portion of the elastic body 66 for the rotating arm is inserted into the boss 652, which is the rotation fulcrum of the rotating arm 60. The arm portions provided at both ends of the rotating arm elastic body 66 are divided into two directions in the outward direction upward from the end portion of the coil portion with the coil portion of the rotating arm elastic body 66 as a tangent line. It is provided in a V shape in the side view shown in FIG.

One end of the arm portion of the elastic body 66 for a rotating arm extends to the inner surface of the rear bending portion 603 and is locked. The other end of the arm portion of the rotating arm elastic body 66 extends to the rear surface of the locking portion 656 and is locked. By providing the elastic body 66 for the rotating arm as described above, the snow removal plate 6 is urged in a direction of rotating upward, and the rotating arm 60 is used to rotate upward. The operator's operation force is reduced.

When the snow removal plate 6 is used when the snow removal plate is not working, the operator grips the handle portion 64 of the snow removal plate 6 whose operating force is reduced by the elastic body 66 for the rotating arm, and the auger housing 50 is used. It can be easily rotated upward. The snow removal plate 6 rotated upward is locked by a fixing portion 7 provided in the upper portion of the auger housing 50 so as not to rotate downward.

The fixing portion 7 includes a base 71, a fulcrum shaft 721, a fixing means 73, and an elastic body 75 for fixing means, and is a mechanism for fixing the snow removal plate 6 rotated upward. .. Further, by performing an operation of releasing the fixing of the fixing portion 7, it is possible to release the fixing of the snow removal plate 6 and bring the snow removal plate 6 into a state in which the snow removal plate 6 can be switched to the snow removal plate working state.

The base 71 is a component that supports the fulcrum shaft 721, and includes a base plate 711, an upper locking portion 712, an upper stopper 713, and a boss 714.
The base plate 711 is a plate-shaped member cut out in a substantially convex shape, and the plate surface is attached to the outer surface at the upper portion of each of the auger housing side plates 500 provided on the left and right sides of the auger housing 50. .. The convex portion provided on the base plate 711 is provided toward the upper side and the rear side.
Further, a part of the rear side of the upper end edge portion of the convex portion is bent outward to form an upper locking portion 712 for locking the elastic body 75 for fixing means described later. ing.

The upper stopper 713 is provided in front of the base plate 711. The upper stopper 713 is bent in a V shape by a plate-shaped member, and the bent corners are arranged so as to face downward, and the plate surface is fixed so as to be perpendicular to the base plate 711. The front surface of the bent plate of the upper stopper 713 abuts on the upper bent portion 602 of the rotating arm 60 when the snow removal plate is not working, and the rear surface of the rotating arm 60 is in contact with the upper bent portion 602. It has the effect of restricting the rotation to. The outer and rear surfaces of the bent plate of the upper stopper 713 are in contact with the edge of the fixing means 73, which will be described later, and have a role of restricting the rotation of the fixing means 73 to the front side and the upper side. ..

A boss 714 whose axis is orthogonal to the plate surface of the base plate 711 is fixed between the upper locking portion 712 and the upper stopper 713 of the base plate 711. The boss 714 is located on the upper side of the auger housing side plate 500. Both ends of the boss 714 are provided so as to project from the plate surface of the base plate 711.
The fulcrum shaft 721 is inserted into the inner diameters of the bosses 714 provided on the left and right sides of the auger housing 50 at right angles to the traveling direction so as to bridge the auger housing. Both ends of the fulcrum shaft 721 are provided so as to project from the outer ends of the boss 714.

A lever 722 is provided on the right side of the fulcrum shaft 721 in the traveling direction and on the left side shown in FIG. The lever 722 has a rod member bent in a U shape, with two bent portions facing rearward, and both ends thereof being fixed to the fulcrum shaft 721. The central portion of the lever 722 can be grasped by the operator to rotate the fulcrum shaft 721. Further, the lever 722 is provided close to each other so that the operator can grasp it with one hand together with the handle portion 64 in the snow removal plate non-working state.

Fixing means 73 having a boss portion for fixing the snow removal plate 6 in a non-working state of the snow removal plate is arranged at the tip portions on both sides of the fulcrum shaft 721. The boss portion of the fixing means 73 is fixed to the tip end portion of the shaft 721.
The fixing means 73 is a plate-shaped member elongated in the vertical direction, has a boss portion provided orthogonal to the plate surface on the upper end side, and has a U-shape on the front end portion on the lower end side. It forms a hook part. The hook portion of the fixing means 73 is rotatable around the fulcrum shaft 721.
Further, the fixing means 73 provided at the tip portions on both the left and right sides of the fulcrum shaft 721 are both fixed at the same angle and rotate in the same direction in conjunction with the rotation of the fulcrum shaft 721. Is possible.
The hook-shaped portion of the fixing means 73 directed to the front side engages with the pin 604 fixed to the inside of the rotating arm 60, so that the posture of the snow removal plate 6 in the non-working state of the snow removal plate 6 Can be fixed.

Further, the end edge of the tip portion on the outer side in the radial direction of rotation of the fixing means 73 is formed with an inclined portion so as to be tapered. In this embodiment, the sandwiching angle of the inclined portion of the fixing means 73 is provided at 15 degrees to 35 degrees. The inclined portion of the fixing means 73 is provided with the pin 604 provided on the rotating arm 60 when the snow removal plate 6 is rotated in order to switch from the snow removal plate working state to the snow removal plate non-working state. It has the effect of smoothly guiding the hook portion of the fixing means 73 along the inclined portion of the fixing means 73.
The upper edge on the front side of the fixing means 73 is in contact with the rear surface of the upper stopper 713, so that the upward rotation is restricted.
Further, a concave notch is provided in a part of the end edge portion of the upper bent portion 602 so that the fixing means 73 and the upper bent portion 602 do not interfere with each other when the snow removal plate is not working. ..

An elastic body 75 for fixing means is arranged between the fixing means 73 and the base 71. In this embodiment, the elastic body 75 for fixing means is a torsion coil spring having arms at both ends provided in a V shape. In the elastic body 75 for fixing means, the coil portion is inserted into the fulcrum shaft 721, the arm portion on one end side is locked to the upper locking portion 712, and the arm portion on the other end side further outwards the tip portion. It is bent and locked to the rear side of the fixing means 73.

The fixing means 73 is urged by the elastic body 75 for the fixing means so that the hook portion of the fixing means 73 always rotates forward and upward. The edge portion of the plate on the front side of the urged fixing means 73 abuts on the bent rear surface of the upper stopper 713, so that the fixing means 73 can rotate forward and upward. It is regulated.

The snow removal plate 6 in the non-working state can be fixed by engaging with the pin 604 by the fixing means 73, and can be maintained in the fixed state by the elastic body 75 for the fixing means. Further, the snow removal plate 6 rotated from the snow removal plate working state to the snow removal plate non-working state has the pin 604 attached to the hook portion of the fixing means 73 along the inclined portion on the tip end side of the fixing means 73. It can be guided and automatically engaged by the elastic body 75 for fixing means.

When switching the non-working state of the snowplow plate of the snowplow 1 to the working state of the snowplow plate, the lever 722 is grasped together with the handle portion 64 to rotate the fulcrum shaft 721. The fixing means 73 rotates with the rotation of the fulcrum shaft 721, and the hook portion of the fixing means 73 engaged with the pin 604 is disengaged. The snow removal plate 6 that has been disengaged from the pin 604 is rotated in the forward direction in order to bring the snow removal plate into a working state.

The operator can freely rotate the snow removal plate 6 by continuously gripping the handle portion 64 after releasing the hand from the lever 722 gripped together with the handle portion 64. The snow removal plate 6 can be switched to the snow removal plate working state. Since the snow removal plate 6 during the rotation operation is urged upward by the elastic body 66 for the rotation arm provided at the rotation fulcrum portion, the operator can use the weight of the snow removal plate 6 by itself. It is not necessary to support all of the above, and it is possible to easily switch to the snow removal board working state.

The snow removal plate 6 in the snow removal plate working state is restricted from rotating downward by the upper bent portion 602 abutting on the lower stopper 655. Further, since the force for rotating the snow removal plate 6 downward by the weight of the snow removal plate 6 is larger than the force for assisting the rotation of the snow removal plate 6 upward by the elastic body 66 for the rotation arm, the snow removal plate 6 is said to be removed. The plate 6 can maintain the posture of the snow removal plate working state.

When switching the snow removal plate 6 from the snow removal plate working state to the snow removal plate non-working state, when the handle portion 64 is grasped and the snow removal plate 6 is rotated upward, it comes into contact with the upper stopper 713. In the fixing means 73, the pin 604 provided on the rotating arm 60 comes into contact with the inclined portion on the tip end side of the fixing means 73, and the fixing means 73 is rotated to the rear side as it is.
The upper bent portion 602 of the snow removal plate 6 that has rotated to the non-working state of the snow removal plate comes into contact with the upper stopper 713, so that the rotation of the snow removal plate 6 to the rear side is restricted.

The fixing means 73, which has been rotated backward by the pin 604, rotates forward again. By engaging the hook portion of the rotation fixing means 73 so as to be caught by the pin 604 provided on the rotation arm 60, the snow removal plate 6 in the non-working state of the snow removal plate can maintain its posture. That is, the operator can easily maintain the posture of the snow removal plate in the non-working state only by rotating the snow removal plate 6 upward and rearward.

Further, since the snow removal plate 6 is urged in the direction of rotating upward by the elastic body 66 for the rotation arm, the operator does not need to support the entire weight of the snow removal plate 6. It is possible to easily switch to the non-working state of the snow removal plate.

In order to perform snow removal work by the snow remover 1 of this example, when the amount of snow is relatively large, the snow removal unit 5 is driven to throw snow and remove snow. In this case, the snow removal plate 6 is rotated above the auger housing 50, and the pin 604 of the rotation arm 60 is engaged with the hook portion of the fixing means 73, so that the snow removal plate is in a non-working posture. Is being held.

When the amount of snow is relatively small or there is no snow throwing place, the snow removal unit 5 is not driven, and the snow S is pushed out by the snow removal plate 6 to remove snow. When the snow removal plate 6 is used, the handle portion 64 attached to the blade 61 and the lever 722 of the fulcrum shaft 721 are gripped, and the fixing means 73 and the pin 604 of the rotating arm 60 are engaged with each other. It is released so that the snow removal plate 6 can be freely rotated. The rotatable snow removal plate 6 is rotated downward from above the auger housing 50 to bring it into a snow removal plate working state located in front of the snow removal portion 5. The upper bent portion 602 of the snow removal plate 6 in the snow removal plate working state holds the posture of the snow removal plate working state by abutting with the lower stopper 655.
When the traveling portion is driven to move forward, the snow scraped off by the scraper 62 of the snow removal plate 6 rises along the blade 61, is dropped forward from the upper portion, and the snow is sequentially raised in front of the blade 61 portion to remove snow. be able to.
When the snow removal work using the snow removal plate 6 is completed, the handle portion 64 attached to the blade 61 is grasped and the snow removal plate 6 is rotated upward to take a posture in a non-working state of the snow removal plate. Hold it.

Next, a second embodiment will be described with reference to FIG. 7 as another embodiment of the present invention. In the second embodiment, the elastic body 66a for the rotating arm, which is urged in the direction of rotating upward of the snow removing portion 6, uses a tension spring. Only the differences from the first embodiment will be described.
Hooks are formed at both ends of the spirally wound coil portion of the rotating arm elastic body 66a. The hook portion on one end side of the elastic body 66a for the rotating arm bends a rod-shaped member in a U shape on the upper surface of the upper bent portion 602 of the rotating arm 60 in front of the rotating arm rotation fulcrum 601. And both ends are attached to the lower attachment portion 67a fixed to the upper bending portion 602. The hook portion on the other end side of the elastic body 66a for the rotating arm is attached to the upper mounting portion 78a of the pin-shaped member fixed outwardly behind the base 71.
Since the elastic body 66a for the rotating arm is arranged as described above, a tensile force is generated in the direction in which the elastic body 66a for the rotating arm contracts, and the snow removing portion 6 is assisted in the direction of rotating upward. , The operation force of the operator is reduced.

Next, as another embodiment of the present invention, a third embodiment will be described with reference to FIG. In the third embodiment, the elastic body 66b for the rotating arm that is urged in the direction of rotating upward of the snow removing portion 6 encloses the machine body and the fluid in the tubular portion, and the rod enters and exits from the tubular portion. Therefore, an elastic body that generates a repulsive force in the extension side direction is used. Only the differences from the first embodiment will be described.
The tip of the tubular portion and the tip of the rod portion of the elastic body 66b for the rotating arm are provided with mounting holes. The mounting hole on the rod portion side of the elastic body 66b for the rotating arm is attached to the lower mounting portion 67a in which the rear portion of the rotating arm 60 is further extended to the rear side and the pin member is fixed outward. Has been done. The mounting hole on the tubular portion side of the elastic body 66b for the rotating arm is attached to the upper mounting portion 78a of the pin-shaped member fixed outwardly behind the base 71.
By arranging the elastic body 66b for the rotating arm as described above, the elastic body 66b for the rotating arm generates a repulsive force on the extension side, and the snow removal portion 6 is assisted in the direction of rotating upward. , The operation force of the operator is reduced. In this embodiment, the elastic body 66b for the rotating arm uses an elastic body that contains the machine body and the fluid in the cylinder portion and generates a repulsive force by the rod moving in and out from the cylinder portion, but a compression spring may also be used. The same effect can be achieved.

The present invention has a traveling portion with a crawler belt, tires, etc., a snow auger for scraping snow and a snow removing portion for throwing the scraped snow with a blower are provided at the front portion of the machine body, and snow is removed further in front of the snow removing portion. It can be applied to snowplows that allow the board to be placed.

1 Snowplow 2 Engine part 3 Operation part 4 Traveling crawler belt 5 Snow removal part 50 Auger housing 500 Auger housing side plate 6 Snow removal plate 60 Rotating arm 601 Rotating arm rotation fulcrum 602 Upper bending part 603 Rear bending part 604 Pin 61 Blade 62 Scraper 63 Blade side plate 64 Handle 65 Support arm 655 Lower stopper 656 Locking part 66 Elastic body for rotating arm 7 Fixing part 71 Base 712 Upper locking part 713 Upper stopper 721 Supporting shaft 722 Lever 73 Fixing means 75 For fixing means Elastic body S snow

Claims (4)

An auger housing that opens toward the front is provided, and a snow removal section is provided at the front of the machine to throw snow collected in the center by a rotating auger inside the auger housing with a blower that is rotationally driven behind it. In the machine
It has a snow removal plate for snow removal that can be placed in front of the snow removal unit.
The snow removal plate can be switched between a snow removal plate working state located in front of the snow removal portion and a snow removal plate non-working state located above the auger housing.
The switching is a structure that extends from the snow removal plate to the left and right, and is rotated and switched by a rotating arm that is vertically rotatably attached via a support arm provided on the outer side of the left and right side plates of the auger housing. There,
The rotating arm has an elastic body for the rotating arm and an elastic body for the rotating arm so as to urge the snow removal plate in the upward rotation direction.
The rotating arm includes an upper bent portion in which the upper side is bent, and a rear bent portion in which the rear side is bent.
The support arm comes into contact with the upper bent portion to regulate the downward rotation of the rotating arm in the snow removal plate working state, and a lower stopper.
The support arm has a locking portion that locks the other end of the elastic body for a rotating arm, one end of which is locked to the rear bending portion.
A snowplow featuring a snowplow. The attitude of the snow board snow board non-working state, and fixing means which can fix the posture,
The fixing means includes an elastic body for fixing means that urges the snow-removing plate in a direction of holding the snow-removing plate in a non-working state.
Only when the operation of releasing the fixing means is performed, the fixing of the snow removal plate in the non-working state of the snow removal plate is released.
The snowplow according to claim 1, wherein the snowplow is characterized by the above. The fixing means includes an inclined portion provided on the edge of the tip portion on the outer side in the radial direction of rotation.
The posture of the snow-removing plate in the non-working state of the snow-removing plate is such that the snow-removing plate is only rotated from the working state of the snow-removing plate to the non-working state of the snow-removing plate, and the inclined portion is the rotating arm. Can be induced and fixed by the fixing means,
The snowplow according to claim 2, characterized in that. The snow removal plate has a handle portion for operating the snow removal plate to be rotated, and a handle portion for operating the snow removal plate.
The fixing means is provided with a lever for operating the fixing means.
The handle portion of the snow removal plate in a non-working state and the lever are arranged close to each other so that they can be operated with one hand .
The handle portion is gripped together with the lever, and the snow removal plate can be rotated by continuously gripping the handle portion even after releasing the hand from the lever.
The snowplow according to claim 3, wherein the snowplow is characterized by the above.

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